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Файл:Микропроцессорная техника / MSP430G2xx3_Code_Examples / msp430g2xx3_nmi
.c/* --COPYRIGHT--,BSD_EX
* Copyright (c) 2012, Texas Instruments Incorporated
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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*
*******************************************************************************
*
* MSP430 CODE EXAMPLE DISCLAIMER
*
* MSP430 code examples are self-contained low-level programs that typically
* demonstrate a single peripheral function or device feature in a highly
* concise manner. For this the code may rely on the device's power-on default
* register values and settings such as the clock configuration and care must
* be taken when combining code from several examples to avoid potential side
* effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
* for an API functional library-approach to peripheral configuration.
*
* --/COPYRIGHT--*/
//******************************************************************************
// MSP430G2xx3 Demo - Basic Clock, Configure RST/NMI as NMI
//
// Description: Configure RST/NMI as NMI, hi/lo edge. Flash P1.0 inside of
// NMI_ISR if NMI occurs. General enable interrupt in status register does
// not need to be set for NMI. NMIIE does need to be reset, as NMI_ISR
// automatically clears NMI enable to prevent unintentional stack overflow
// that could result from, bounce or uncontrolled NMI's.
// ACLK = n/a, MCLK = SMCLK = DCO ~ 800k
//
// MSP430G2xx3
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
//
// D. Dang
// Texas Instruments Inc.
// December 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430.h>
int main(void)
{
WDTCTL = WDTPW + WDTHOLD + WDTNMI + WDTNMIES; // WDT off NMI hi/lo
P1DIR |= 0x01; // Set P1.0 to output direction
P1OUT &= ~0x01; // Clear P1.0 LED off
IE1 |= NMIIE; // Enable NMI
_BIS_SR(LPM0_bits); // Enter LPM0
}
#pragma vector=NMI_VECTOR
__interrupt void nmi_ (void)
{
volatile unsigned int i;
P1OUT |= 0x01; // Set P1.0 LED on
for (i = 20000; i > 0; i--); // Delay
P1OUT &= ~0x01; // Clear P1.0 LED off
IFG1 &= ~NMIIFG; // Reclear NMI flag in case bounce
IE1 |= NMIIE; // Enable NMI
}
Соседние файлы в папке MSP430G2xx3_Code_Examples